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IID in pv also when TT move depth is too small
authorMarco Costalba <mcostalba@gmail.com>
Fri, 6 Nov 2009 15:08:39 +0000 (16:08 +0100)
committerMarco Costalba <mcostalba@gmail.com>
Fri, 6 Nov 2009 16:52:04 +0000 (17:52 +0100)
Try an internal iterative deepening not only when we don't
have a TT move but also if search depth is more then 4*OnePly
higher then TT move depth.

On some tests it seems that in around 20% of cases ttMove changes !

Signed-off-by: Marco Costalba <mcostalba@gmail.com>

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